Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A violet, light-sensitive pigment found in the retinal cones of the eye.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
photoreceptor protein found in thecone cells of theretina , the basis ofcolour vision .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision
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